As everyone who watches football knows, one of the best parts of the sport is when a player gets fined a huge amount of money for doing something silly like dancing too much. Now, with eSports slowly gaining mainstream popularity in this country, it has apparently developed its own rules about acting silly. According to USA Today, famous billionaire Mark Cuban recently took part in an exhibition League Of Legends match during the Intel Extreme Masters tournament in San Jose, with his team of actual League players competing against Intel CEO Brian Krazanich and another team of actual League players.

During some pre-game trash-talk, Cuban reportedly “dropped an f-bomb” (or “he said fuck” for people who don’t give a shit about swearing), which is evidently against the rules. After the match had ended, Cuban was informed that he had been fined $15,000 for his inappropriate language, with the money going to anti-cyberbullying charity Cybersmile. Cuban—who was wearing a Three Comma Club t-shirt, which is either mildly cool or totally douchey—replied, “so if I say it again I have to pay another $15,000?” The interviewer said he would, so Cuban responded with another “fuck it.” Much like an NFL player dancing too much, it was a little funny, didn’t hurt anybody, and probably pissed off a League Of Legends purist who hates it when people don’t take the game seriously.